linux-kernel - Re: [PATCH v5 07/20] x86/kexec: Invoke copy of relocate

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Message-ID: <20241218090305.y4o62pmdwq32732h@jpoimboe>
Date: Wed, 18 Dec 2024 01:03:05 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: David Woodhouse <dwmw2@...radead.org>
Cc: Nathan Chancellor <nathan@...nel.org>, kexec@...ts.infradead.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Kai Huang <kai.huang@...el.com>,
	Nikolay Borisov <nik.borisov@...e.com>,
	linux-kernel@...r.kernel.org, Simon Horman <horms@...nel.org>,
	Dave Young <dyoung@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>, bsz@...zon.de
Subject: Re: [PATCH v5 07/20] x86/kexec: Invoke copy of relocate_kernel()
 instead of the original

On Tue, Dec 17, 2024 at 01:03:07PM +0100, David Woodhouse wrote:
> I've dropped this for now and just posted the __nocfi thing as the
> regression fix. I think we *should* provide the CFI information in
> relocate_kernel_64.S though, so I've left these commits in my tree at
> https://git.infradead.org/?p=users/dwmw2/linux.git;a=shortlog;h=refs/heads/kexec-debug
> 
> I'd really appreciate some help in getting objtool to stop whining
> about them, for *both* Clang and GCC builds at the same time :)

Hm, I can't fetch for some reason:

  $ git fetch https://git.infradead.org/users/dwmw2/linux.git kexec-debug
  fatal: https://git.infradead.org/users/dwmw2/linux.git/info/refs not valid: could not determine hash algorithm; is this a git repository?

At some point we had discussed placing the code in .rodata, was it the
alternative preventing that?

-- 
Josh